Sofa



FIG. 1 is a top plan view of a sofa showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof; (the right side view being a mirror image);

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a sofa, as shown and described. 